/ Root root user's home directory
/ Home / username home directory of the user named username
/ Bin directory to store user-level binary tools GNU
/ Sbin stage binary system administrator-level directory for GNU tools
/ Usr (unix software resource) user binary directory
/ Etc storage system configuration files
/ Boot boot boot directory to store related files
/ Dev directory Linux device here to create a device node
/ Lib storage system and application library files
/ Proc process directory for the current process of existing hardware and related information
/ Opt to store commonly used third-party software packages and data files
/ Media may be used mobile media device mount point
/ Mnt other removable media device mount point
Data / run storage system runtime
/ Srv local service information storage
/ Sys storage system hardware related information
/ Tmp often create and delete temporary work files in the directory
/ Var storing frequently changing files such as log files